[Novalug] benchmarking iSCSI

[Kevin Dwyer]

On Thu, Sep 13, 2007 at 04:48:10PM -0400, Miguel Gonzalez Castaños wrote:
> bonnie -d /mnt/virtualdata1/ -s 512 -m svn -u root
> 
> Version  1.03       ------Sequential Output------ --Sequential Input-
> --Random-
>                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
> --Seeks--
> Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
> /sec %CP
> svn            512M 13594  43 15746  18  2292   3  2702   9  2905   2
> 482.8   4
>                    ------Sequential Create------ --------Random
> Create--------
>                    -Create-- --Read--- -Delete-- -Create-- --Read---
> -Delete--
>              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
> /sec %CP
>                 16  1685  91 +++++ +++ 25747  92  1576  91 +++++ +++
> 5134  92
> svn,512M,13594,43,15746,18,2292,3,2702,9,2905,2,482.8,4,16,1685,91,+++++,+++,25747,92,1576,91,+++++,+++,5134,92
> 
> This results make sense?

>From the manpage:
"""
For  every test two numbers are reported, the amount of work done
(higher numbers are better) and the percentage of CPU time taken to
perform the work (lower numbers are  better).  If  a  test completes in
less than 500ms then the output will be displayed as "++++". This is
because such a test result can’t be calculated accurately due to
rounding errors and  I would rather display no result than a wrong
result.
"""

Remember that these numbers only really help you in a comparison, unless
you already know you need to reach a certain level of data throughput.
So if you're trying to determine whether the drive is faster than
another drive, you should run bonnie on both with the same params and
see what the differences are.  Likewise if you were tuning.

-kpd

P.S. Here are mine:

Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
ganon            1G 26529  85 48895  16 21730   6 29927  83 51802   5 127.6   1
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  2376  97 +++++ +++ +++++ +++  2474  97 +++++ +++  6773  91

I have an IDE drive, so you can see that mine eats up more CPU than your
SCSI drive, and I'm pushing more data than you.